From: "Rob Herring (Arm)" <robh@kernel.org>
To: Akhil R <akhilrajeev@nvidia.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Frank Li <Frank.Li@kernel.org>,
Jonathan Hunter <jonathanh@nvidia.com>,
Vinod Koul <vkoul@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Laxman Dewangan <ldewangan@nvidia.com>,
dmaengine@vger.kernel.org,
Thierry Reding <thierry.reding@kernel.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
linux-tegra@vger.kernel.org
Subject: Re: [PATCH v3 1/9] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property
Date: Wed, 25 Mar 2026 11:35:53 -0500 [thread overview]
Message-ID: <177445655239.3768983.8317731580595020400.robh@kernel.org> (raw)
In-Reply-To: <20260316171823.61800-2-akhilrajeev@nvidia.com>
On Mon, 16 Mar 2026 22:48:15 +0530, Akhil R wrote:
> Add iommu-map property to specify separate stream IDs for each DMA
> channel. This enables each channel to be in its own IOMMU domain,
> keeping memory isolated from other devices sharing the same DMA
> controller.
>
> Define the constraints such that if the channel and stream IDs are
> contiguous, a single entry can map all the channels. If the channels
> or stream IDs are non-contiguous, support multiple entries.
>
> Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
> ---
> .../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
next prev parent reply other threads:[~2026-03-25 16:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-16 17:18 [PATCH v3 0/9] Add GPCDMA support in Tegra264 Akhil R
2026-03-16 17:18 ` [PATCH v3 1/9] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property Akhil R
2026-03-25 16:35 ` Rob Herring (Arm) [this message]
2026-03-16 17:18 ` [PATCH v3 2/9] dt-bindings: dma: nvidia,tegra186-gpc-dma: Make reset optional Akhil R
2026-03-24 10:47 ` Jon Hunter
2026-03-25 16:37 ` Rob Herring (Arm)
2026-03-16 17:18 ` [PATCH v3 3/9] dmaengine: tegra: Make reset control optional Akhil R
2026-03-16 17:18 ` [PATCH v3 4/9] dmaengine: tegra: Use struct for register offsets Akhil R
2026-03-16 17:18 ` [PATCH v3 5/9] dmaengine: tegra: Support address width > 39 bits Akhil R
2026-03-16 17:18 ` [PATCH v3 6/9] dmaengine: tegra: Use managed DMA controller registration Akhil R
2026-03-16 17:18 ` [PATCH v3 7/9] dmaengine: tegra: Use iommu-map for stream ID Akhil R
2026-03-16 17:18 ` [PATCH v3 8/9] dmaengine: tegra: Add Tegra264 support Akhil R
2026-03-16 17:18 ` [PATCH v3 9/9] arm64: tegra: Enable GPCDMA and add iommu-map in Tegra264 Akhil R
2026-03-24 10:46 ` Jon Hunter
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